[455] Joyce, P. W., op. cit. I., pp. 560–563.

[456] Coffey, G., Guide to Antiquities of Christian Ireland. Illustration.

[457] Joyce, P. W., op. cit. I., p. 560.

[458] Joyce, P. W., op. cit. I., p. 567.

[459] MacAlister, R. A. S., Muiredach, Abbot of Monasterboice (890–923 A.D.). This work gives a detailed account of one of these crosses at Monasterboice.

[460] Abelson, Paul, The Seven Liberal Arts, p. 64.

[461] Text in Migne, Latin Patrology, Vol. 90, Col. 294–578.

[462] Text in Migne, Latin Patrology, Vol. 107, Col. 669–727.

[463] See Abelson, Paul, op. cit. p. 90.

[464] Abelson, Paul, op. cit. p. 100; Turner, Wm., Hist. of Phil., p. 257.